If the server has already been shut down, then make .shutdown_server() do nothing instead of throwing an error
If the server has already been shut down, then make .shutdown_server() do nothing instead of throwing an error

h2oai/h2o-3,spennihana/h2o-3,h2oai/h2o-3,michalkurka/h2o-3,spennihana/h2o-3,jangorecki/h2o-3,jangorecki/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,michalkurka/h2o-3,jangorecki/h2o-3,mathemage/h2o-3,mathemage/h2o-3,h2oai/h2o-dev,h2oai/h2o-dev,jangorecki/h2o-3,spennihana/h2o-3,michalkurka/h2o-3,spennihana/h2o-3,mathemage/h2o-3,spennihana/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,h2oai/h2o-3,mathemage/h2o-3,spennihana/h2o-3,michalkurka/h2o-3,spennihana/h2o-3,mathemage/h2o-3,h2oai/h2o-3,h2oai/h2o-dev,h2oai/h2o-3,michalkurka/h2o-3,h2oai/h2o-3,jangorecki/h2o-3,jangorecki/h2o-3,h2oai/h2o-3,h2oai/h2o-dev,jangorecki/h2o-3,mathemage/h2o-3,mathemage/h2o-3,h2oai/h2o-dev,h2oai/h2o-3